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Encapsulation for Bit Index Explicit Replication in MPLS Networks

Document Type Replaced Internet-Draft (bier WG)
Expired & archived
Authors IJsbrand Wijnands , Eric C. Rosen , Andrew Dolganow , Jeff Tantsura , Sam Aldrin
Last updated 2015-10-14 (Latest revision 2014-12-04)
Replaced by draft-ietf-bier-mpls-encapsulation, draft-ietf-bier-mpls-encapsulation, RFC 8296
RFC stream Internet Engineering Task Force (IETF)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-bier-mpls-encapsulation, draft-ietf-bier-mpls-encapsulation
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Bit Index Explicit Replication (BIER) is an architecture that provides optimal multicast forwarding through a "multicast domain", without requiring intermediate routers to maintain any per-flow state or to engage in an explicit tree-building protocol. When a multicast data packet enters the domain, the ingress router determines the set of egress routers to which the packet needs to be sent. The ingress router then encapsulates the packet in a BIER header. The BIER header contains a bitstring in which each bit represents exactly one egress router in the domain; to forward the packet to a given set of egress routers, the bits corresponding to those routers are set in the BIER header. The details of the encapsulation depend on the type of network used to realize the multicast domain. This document specifies the BIER encapsulation to be used in an MPLS network.


IJsbrand Wijnands
Eric C. Rosen
Andrew Dolganow
Jeff Tantsura
Sam Aldrin

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)